A steel hub of 100mm internal diameter and uniform thickness of 10 mm was heated to a temperature of 3000C to shrink fit it on a shaft. On cooling, a crack developed parallel to the direction of the length of the hub. The cause of the failure is attributed to
(a) Tensile hoop stress
(b) Tensile radial stress
(c) Compressive hoop stress
(d) Compressive radial stress